Valentin Tanasa / Mbed 2 deprecated nRF51822_DataLogger_with_Chat

This program is designed to work with RedBearLab BLE Controller App - Chat App. Type something from the Terminal to send to the BLEController App or vice verse. Characteristics received from App will print on Terminal. This Program scans some analog and digital inputs and save them in flash with timestamp. A RTC has been implemented. Using chat application (available for smart phones) some commands can be send to BLE Nano in order to perform some tasks. Other types of commands can be send via serial interface from a PC, especially data extraction from flash.

Dependencies:   BLE_API mbed nRF51822

Fork of nRF51822_SimpleChat_VT by Valentin Tanasa

nRF51822_SimpleChat Extended With Data Measurements & Logger

This repo is derived from the initial SimpleChat Application and is build for BLE Nano Device, used in peripheral mode. This Application scan and measures some inputs and save them in flash with timestamp. A RTC has been implemented. Using chat application (available for smart phones) some commands can be send to BLE Nano in order to perform some tasks. Other types of commands can be send via serial interface from a PC, especially data extraction from flash.

Usage/Description:

After flashing or power on, the ble device will start to advertise and also its local time counter starts. While initializing, application will search through all flash pages, last data previosly written. From this pages will retrieve the last data and time available.

A Timer Tick (period set to 1 second) is used for updating RTC and for data measurements. When the application starts the data will not be saved in flash until a command is given to start (xf2). When started, it is recommended after connecting to ble device to set the time and date;

After the date and time updated, activate measurement logging (xf2).

Please be aware that for 5-6 seconds, each 100 seconds the connection is stopped by the application. This is due to fact that writing to flash is safe when radio connection is off. When g_MyDataIdx is between 95..100, connection should remain closed.

The Application can use somewhere around 100 flash pages (100K). This means, if data is sampled each second, the pages will start to overwrite after 100*100 seconds = 2.7 hours. Anyway the data is inserted into logger when it is different compared to previous measurement. Therefore the time the flash memory can log is bigger than 2.7 hours.

When retrieving the data log via serial, the format is as follows:

  • page starts with:
    2016_ 4_22 H: 7 => year, month, day, and hour
    26:51;363; 1; 15 => minutes: seconds; A3,A4,A5 (no info about digital inputs)
  • following rows up to the next page:
    0: 5;364; 1; 15 => minutes: seconds - time delta (time elapsed since last measurement); A3, A4, A5;

Hardware Connections

The BLE Nano Device is connected to some peripheral components as follows:

  • Light Sensor ( A3 input)
  • Temperature Sensor (A4 input)
  • Gnd Voltage (or anything else) (A5 input)
  • Buzzer (D6 output)
  • Push Button (D5 input)
  • [Optional]: MKUSB 20 Board (for Voltage Supply and for Serial Communication with a PC)

Supported Commands

  1. From RedBear Chat Application following messages are valid:
  • Any message that not start with 'x' is echoed with 'R:' as prefix, and also is send via Serial Interface to PC
  • Any message that start with 'x' is interpreted as command:
    • xi0 / xi* except {1,2,3,4} => prints the analog inputs and one digital input (the led status) as uint16 values
    • xi1 /xi2 / xi3 / xi4 =>prints the uint16 value for light, temp, gndV, led status
    • xl => toggle led status
    • xs[0-9][0-9] => buzzer; depending on digits, a digital pwm signal is send to buzzer; to deactivate: xs00
    • xtg => returns the current time
    • xti[0-9]{6} => insert time - exp: xti181004 means: 18H10M and 4 seconds
    • xdg => returns the current date
    • xdi[0-9]{6} => insert date - exp: xti160424 means: 2016 Y, 04 Month, 24 Day
    • xf1 => prints the value of g_MyDataIdx (a value now between 0..99) representing the steps until a new page will be written in flash with new data; It also print the current flash page that will be written (between 155 and 255)
    • xf2 => activate measurements logging
    • xf3 => deactivate measurements logging
    • x* => for invalid syntax a sound for 3 seconds is activated, with a message error
  1. From PC serial interface (with MKUSB 20 Board), following commands apply:
  • xf[0-9] => request printing on serial of a specific flash page ( 0 - current page; 1 - previous page, etc)
  • xd => request dump of all recorded logs (starting with current page)
  • xg => prints the value of g_MyDataIdx (a value now between 0..99) representing the steps until a new page will be written in flash with new data;
  • xca => open Radio Advertising (should be used when the Advertising is Off)
  • xcc => Close Radio connection (should be used when Connection is in Connected state)
  • xcs => Stop Radio Advertising (should be used when Advertising is active)

Other Commands:

  • button push => closes the connection/advertising and turn off the led. If push again reset the previous conditions;

References

The mbed BLE API is meant to be used in projects on developer.mbed.org. Please see examples and sample project files there. A good starting point are these pages:

For this Application:

myData.h@11:baafa4f7a15e, 2016-05-06 (annotated)

Committer:
tanasaro10
Date:
Fri May 06 18:14:18 2016 +0000
Revision:
11:baafa4f7a15e
Parent:
9:303d3628986a 
minor updates

Who changed what in which revision?

UserRevisionLine numberNew contents of line
tanasaro10 9:303d3628986a 1 #include "ble_flash.h"
tanasaro10 9:303d3628986a 2 #include "mbed.h"
tanasaro10 9:303d3628986a 3
tanasaro10 9:303d3628986a 4 #define MAXBUFFER 99u //(((BLE_FLASH_PAGE_SIZE - 4 - sizeof(myData_t))/sizeof(myDataL_t))
tanasaro10 9:303d3628986a 5 #define MAX_WORD_PAGE_DATA 254u // to be computed as round_next_int(MAXBUFFER*sizeof(myDataL_t)+sizeof(myData_t))
tanasaro10 9:303d3628986a 6
tanasaro10 9:303d3628986a 7 #define MAX_PAGE_NUM (NRF_FICR->CODESIZE - 1) // 255
tanasaro10 9:303d3628986a 8 #define MIN_PAGE_NUM 155u
tanasaro10 8:f28ad4600b0f 9
tanasaro10 8:f28ad4600b0f 10
tanasaro10 8:f28ad4600b0f 11 typedef struct{
tanasaro10 9:303d3628986a 12 uint8_t year; // 20_XX, 2016 => 16;
tanasaro10 8:f28ad4600b0f 13 uint8_t month; // 1..12
tanasaro10 9:303d3628986a 14 uint8_t day; // 1..31
tanasaro10 11:baafa4f7a15e 15 uint8_t hours;
tanasaro10 11:baafa4f7a15e 16 uint8_t minutes;
tanasaro10 11:baafa4f7a15e 17 uint8_t seconds;
tanasaro10 11:baafa4f7a15e 18 } mdate_time_t;
tanasaro10 8:f28ad4600b0f 19
tanasaro10 8:f28ad4600b0f 20
tanasaro10 8:f28ad4600b0f 21 typedef struct{
tanasaro10 11:baafa4f7a15e 22 mdate_time_t currentDateTime;
tanasaro10 11:baafa4f7a15e 23 mdate_time_t newDateTime;
tanasaro10 11:baafa4f7a15e 24 bool updateDateTime; // true if currentTime needs to be updated with newTime;
tanasaro10 11:baafa4f7a15e 25 } mdatetime_manager_t;
tanasaro10 11:baafa4f7a15e 26
tanasaro10 8:f28ad4600b0f 27
tanasaro10 9:303d3628986a 28 typedef enum {
tanasaro10 9:303d3628986a 29 eStartAdvertising =0,
tanasaro10 9:303d3628986a 30 eStopAdvertising =1,
tanasaro10 9:303d3628986a 31 eDisconnect =2
tanasaro10 9:303d3628986a 32 } connection_update_t;
tanasaro10 8:f28ad4600b0f 33
tanasaro10 8:f28ad4600b0f 34 typedef struct {
tanasaro10 9:303d3628986a 35 uint16_t light;
tanasaro10 9:303d3628986a 36 uint16_t gndV;
tanasaro10 9:303d3628986a 37 uint16_t temp;
tanasaro10 8:f28ad4600b0f 38 bool led_on;
tanasaro10 9:303d3628986a 39 bool led2_on;
tanasaro10 9:303d3628986a 40 } myPayload_t;
tanasaro10 9:303d3628986a 41
tanasaro10 9:303d3628986a 42
tanasaro10 9:303d3628986a 43 typedef struct {
tanasaro10 9:303d3628986a 44 myPayload_t data;
tanasaro10 11:baafa4f7a15e 45 uint8_t seconds;
tanasaro10 11:baafa4f7a15e 46 uint8_t minutes;
tanasaro10 9:303d3628986a 47 } myDataL_t;
tanasaro10 9:303d3628986a 48
tanasaro10 9:303d3628986a 49 typedef struct {
tanasaro10 11:baafa4f7a15e 50 mdate_time_t datetime; // 6 bytes length
tanasaro10 11:baafa4f7a15e 51 myPayload_t data; // 8 bytes lenth
tanasaro10 8:f28ad4600b0f 52 } myData_t;
tanasaro10 8:f28ad4600b0f 53
tanasaro10 9:303d3628986a 54 typedef struct {
tanasaro10 9:303d3628986a 55 myData_t startData;
tanasaro10 9:303d3628986a 56 myDataL_t myData[MAXBUFFER];
tanasaro10 9:303d3628986a 57 } myDataLog_t;
tanasaro10 9:303d3628986a 58
tanasaro10 9:303d3628986a 59 typedef struct {
tanasaro10 9:303d3628986a 60 myData_t startData;
tanasaro10 9:303d3628986a 61 myDataL_t myData;
tanasaro10 9:303d3628986a 62 } myDataLogShort_t;
tanasaro10 9:303d3628986a 63
tanasaro10 9:303d3628986a 64 /* Return current page to be written in Flash */
tanasaro10 9:303d3628986a 65 uint8_t flash_currPage();
tanasaro10 9:303d3628986a 66
tanasaro10 9:303d3628986a 67 /* Return next page to be written in Flash */
tanasaro10 9:303d3628986a 68 uint8_t flash_go_nextPage();
tanasaro10 9:303d3628986a 69
tanasaro10 9:303d3628986a 70 /* Return page-N (thas has been written in Flash) */
tanasaro10 9:303d3628986a 71 uint8_t flash_prev_N_Page(uint8_t nr_of_pages);
tanasaro10 8:f28ad4600b0f 72
tanasaro10 9:303d3628986a 73 /*search the latest page written and extract the page_nr, date, and time*/
tanasaro10 11:baafa4f7a15e 74 void search_latest_in_flash(mdate_time_t * outDateTime);
tanasaro10 9:303d3628986a 75
tanasaro10 9:303d3628986a 76 /* Update current date and time with tseconds and also if there is a new date/time given */
tanasaro10 11:baafa4f7a15e 77 void update_time(mdatetime_manager_t* myDateTimeVar, uint16_t tseconds);
tanasaro10 9:303d3628986a 78
tanasaro10 9:303d3628986a 79 /* Update buzzer with period in ms =0..9 and duty cycle = 0..9*/
tanasaro10 9:303d3628986a 80 int buzz_int(PwmOut* buzzer, uint8_t period, uint8_t duty_cycle);
tanasaro10 9:303d3628986a 81
tanasaro10 9:303d3628986a 82 /* Print on serial some error from main app*/
tanasaro10 9:303d3628986a 83 void assert_error_app(bool condition, Serial *pc, uint16_t error, uint16_t line, const char* file);